Regensburg 2016 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 60: III-V Semiconductors (no Nitrides)

HL 60.4: Vortrag

Mittwoch, 9. März 2016, 15:30–15:45, H13

Mapping of an electron wave function by a local electron scattering probe — •Christian Reichl, Werner Dietsche, Thomas Tschirky, Timo Hyart, and Werner Wegscheider — Labor für Festkörperphysik, ETH Zürich, Schweiz

We developped a technique which allows for the detailed mapping of the electronic wave function in two-dimensional electron gases with low-temperature mobilities up to 15·10⁶ cm²/Vs.

Thin ("delta") layers of aluminium are placed into the regions where the electrons reside. This causes electron scattering which depends very locally on the amplitude of the electron wave function at the position of the Al delta-layer. By changing the distance of this layer from the interface we map the shape of the wave function perpendicular to the interface. Despite having a profound effect on the electron mobiliy, the delta-layers do not cause a widening of the quantum Hall plateaus.